JP5300114B2 - Nursery box - Google Patents

Description

  The present invention relates to an improved seedling box used for agricultural crops such as paddy rice or horticultural crops.

At present, granule, powder, emulsion, wettable powder, flowable powder, granular wettable powder and the like are widely known as agricultural chemical preparations. Further, in recent years, labor saving of pesticide spraying, reduction of pesticides has been screamed, and preparations that take into account the reduction of exposure to sprayers are required.
Under such circumstances, the treatment of pesticides in the seedling box has been progressing, and as a treatment for applying the pesticides to the seedling box, the wettable powder, flowable, emulsion, etc., can be sprayed as it is or with a diluted solution thereof. The powder and powder are sprayed as they are.

  In addition, for granules, various attempts have been made to gradually release the pesticidal active ingredient for imparting residual effect, but since the pesticidal active ingredient is gradually released, in order to obtain the desired medicinal effect, The amount of the agrochemical active ingredient in the preparation was inevitably increased. On the other hand, wettable powders, flowables, emulsions and the like have short residual effects, are likely to cause phytotoxicity, and there is a concern about the danger of exposure to agricultural chemicals to workers. Therefore, a method has been proposed in which an agrochemical active ingredient is dissolved in a solvent such as acetone or methanol, impregnated in water-soluble paper, and the seedling box is treated with this (JP-A-64-19002). There are problems such as complicated work such as laying a paper-like material, and the solvent easily evaporates, making it difficult to obtain a sufficient medicinal effect during use.

Problems to be solved by the invention

  Under such circumstances, the present invention, in the treatment of agricultural chemicals, sufficiently exerts medicinal effects with a small amount of active ingredient of agricultural chemicals, maintains stable medicinal effects for a long period of time, does not cause phytotoxicity, and exposes the agricultural chemicals to workers. It is an object to provide a seedling box that eliminates the fear of the problem.

Means for solving the problem

  As a result of intensive studies on the above problems, the inventors of the present invention have said that the above-mentioned problem is that in the seedling box, the contained soil is applied with a granular material carrying a liquid material with a specific solvent of an agrochemical active ingredient. It has been found that it contributes to a solution, and the present invention has been made based on this finding.

That is, the present invention
(1) The agrochemical active ingredient is at least selected from formamide, N-methylformamide, N, N-dimethylformamide, N, N-dimethylacetamide, N, N-diethylacetamide, dimethyl sulfoxide and 1,4-butane sultone Obtained by crushing and sieving a liquid material dissolved or suspended in one or more solvents mainly composed of silica sand, quartzite, pumice, calcium carbonate, bentonite, talc, diatomaceous earth, attapulgite, gypsum or porcelain stone Granules supported on granules with a particle size of 0.1 to 10 mm (excluding zeolite)
And the application amount of the granular material is 60-60 per 1 m ^{2 of} soil.
Nursery box characterized by being in the range of 0 g, and (2) pesticide active ingredients are formamide, N-methylformamide, N, N-dimethylformamide, N, N-dimethylacetamide, N, N-diethylacetamide, dimethyl A liquid obtained by dissolving or suspending in at least one selected from sulfoxide and 1,4-butane sultone or a solvent mainly containing it, powdered clay, calcium carbonate, bentonite, talc or diatomaceous earth, CMC, PVA, pregelatinized starch, dextrin or xanthan gum was used as a binder, and granules obtained by granulation and having a particle size of 0.1 to 10 mm (excluding zeolite) were applied. It contains soil, and the application rate of the granular material is in the range of 60 to 600 g per 1 m ^{2 of} soil. Nursery box, characterized by
Is to provide.

DETAILED DESCRIPTION OF THE INVENTION
As a preferred embodiment of the present invention,
(3) The nursery box according to (1) or (2), wherein the agrochemical active ingredient is at least one selected from among fungicides, insecticides and plant growth regulators,
(4) The nursery box according to any one of (1) to (3), wherein the pesticidal active ingredient is sparingly water-soluble.
(5) The nursery box according to any one of (1) to (4), further containing a lactone as a solvent,
(6) Any of the above (1) to (4), further containing at least one selected from ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, glycerin and ethers of these polyhydric alcohols as a solvent Nursery box as described in the
(7) The above-mentioned (1) to (1), wherein the application amount of the granular material is in the range of 120 to 360 g per 1 m ^{2 of} soil.
6) The nursery box according to any one of
Is mentioned.

  The agrochemical active ingredient used in the present invention is not particularly limited, such as solid or liquid at room temperature, water-soluble or poorly water-soluble, and in particular, N, N-dimethylacetamide, N, N-dimethylformamide and Those which are soluble in at least one solvent selected from dimethyl sulfoxide, and particularly those which are poorly water-soluble are preferred.

  Examples of agricultural chemical active ingredients include bactericides such as 3'-isopropoxy-2-methylbenzanilide (mepronil), α, α, α-trifluoro-3'-isopropoxy-O-toluanilideflutolanil, 3, 4,5,6-tetrachloro-N- (2,3-dichlorophenyl) phthalamic acid (teclophthalam), 1- (4-chlorobenzyl) -1-cyclopentyl-3-phenylurea (pencyclon), 6- (3 5-dichloro-4-methylphenyl) -3 (2H) -pyridazinone (dicromedin), methyl = N- (2-methoxyacetyl) -N- (2,6-xylyl) -DL-alaninate (metalaxyl), (E ) -4-Chloro-α, α, α-trifluoro-N- (1-imidazol-1-yl-2-propoxyethylidene) -o-toluidine ( Triflumizole), [5-amino-2-methyl-6- (2,3,4,5,6-pentahydroxycyclohexyloxy) tetrahydropyran-3-yl] amino-α-iminoacetic acid (Kasugamycin), validamycin 3-allyloxy-1,2-benzisothiazole-1,1-dioxide (probenazole), diisopropyl-1,3-dithiolane-2-ylidene-malonate (isoprothiolane), 5-methyl-1,2,4-triazolo [3,4-b] benzothiazole (tricyclazole), 1,2,5,6-tetrahydropyrrolo [3,2,1-ij] quinolin-4-one (pyroxylone), 5-ethyl-5,8-dihydro -8-oxo [1,3] dioxolo [4,5-g] quinoline-7-carboxylic acid (oxolinic acid), (Z)- '-Methylacetophenone = 4,6-dimethylpyrimidin-2-ylhydrazone-4,5,6,7-tetrachlorophthalide (ferimzone), 3- (3,5-dichlorophenyl) -N-isopropyl-2,4 -Dioxoimidazolidine-1-carboxamide (iprodione), 1,4-bis- (2,2,2-trichloro-1-formamidoethyl) -piperazine (triphorin) and the like, and as insecticides, 2, 3-dihydro-2,2-dimethyl-7-benzo [b] furanyl = N-dibutylaminothio-N-methylcarbamate (carbosulfan), ethyl = N- [2,3-dihydro-2,2- Dimethylbenzofuran-7-yloxycarbonyl (methyl) aminothio] -N-isopropyl-β-alaninate (benfuracarb), (RS -Α-Cyano-3-phenoxybenzyl = (RS) -2,2-dichloro-1- (4-ethoxyphenyl) cyclopropanecarboxylate (cycloprotorin), 1-naphthyl-N-methylcarbamate (NAC) , O, O-diethyl-O- (3-oxo-2-phenyl-2H-pyridazin-6-yl) phosphorothioate (pyridaphenthion), O, O-dimethyl-O-3,5,6-trichloro-2-pyridyl Phosphorothioate (chlorpyrifosmethyl), O, O-dimethyl-S- (N-methylcarbamoylmethyl) dithiophosphate (dimethoate), O, S-dimethyl-N-acetylphosphoramidothioate (acephate), ethyl paranitrophenylthio Nobenzenephosphonate (EPN), 1,3-bis (carbamoyl) E) -2- (N, N-dimethylamino) propane hydrochloride (cartap), 5-dimethylamino-1,2,3-trithian oxalate (thiocyclam), S, S'-2-dimethylaminotri Methylene di (benzenethiosulfonate) (bensultap) -2-tert-butylimino-3-isopropyl-5-phenyl-1,3,5,6-tetrahydro-2H-1,3,5-thiadiazin-4-one (Buprofezin), 1,1′-Iminiodi (octamethylene) diguanidinium = triacetate (guazatine), (RS) -α-cyano-3-phenoxybenzyl = (S) -2- (4-difluoromethoxyphenyl) -3- Such as methyl butyrate (flucitrinate), dimethyl ethyl sulfinyl isopropyl thiophosphate (ESP) However, as plant growth regulators, 4′-chloro-2 ′-(α-hydroxybenzyl) isonicotinanilide (inabenfide), (2RS, 3RS) -1- (4-chlorophenyl) -4,4- Dimethyl-2- (1H-1,2,4-triazol-1-yl) pentan-3-ol (paclobutrazol), (E)-(S) -1- (4-chlorophenyl) -4,4 -Dimethyl-2- (1H-1,2,4-triazol-1-yl) pent-1-en-3-ol (uniconazole), 6- (N-benzylamino) purine (benzylaminopurine), etc. Although it is mentioned, it is not limited to these. These pesticidal active ingredients may be used alone or in combination of two or more.

In the present invention, the solvent used to liquefy the pesticidal active ingredient as a solution or suspension is formamide, N-methylformamide, N, N-dimethylformamide, N, N-dimethylacetamide, N, N- Diethyl acetamide, dimethyl sulfoxide or 1,4-butane sultone is essential, and it consists only of the essential solvent, or mainly contains the essential solvent, preferably 60% by mass or more, particularly 80% by mass or more. These essential solvents may be used alone or in combination of two or more. Among the essential solvents, N, N-dimethylacetamide, N, N-dimethylformamide, and dimethyl sulfoxide are preferable.
In addition to the above essential solvent, the solvent further contains a lactone, and in addition to this or the essential solvent, ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, glycerin or ethers of these polyhydric alcohols such as ethylene glycol or Those containing di-ethylene glycol mono-methyl or ethyl ether are also used. By including a lactone in the solvent, even when a pesticidal active ingredient that is solid at room temperature is contained, the caking property with time can be prevented and storage stability can be improved. Examples of the lactone include γ-butyrolactone, δ-valerolactone, ε-caprolactone, γ-valerolactone, and the like. Among them, γ-butyrolactone is preferable because it is effective in reducing caking property over time and improving storage stability. .

In the present invention, the granular material applied to the soil carries a liquid material of the agrochemical active ingredient, such as a solution or suspension, and the particle size is preferably in the range of 0.1 to 10 mm. Chosen by Usually, the liquid is preferably supported on a carrier, especially an inorganic carrier, particularly a mineral carrier.
Examples of this carrier include silica sand, quartzite, pumice, calcium carbonate, bentonite, talc, diatomaceous earth, zeolite, attapulgite, gypsum, porcelain stones, etc. Examples thereof include granular materials obtained by granulation using calcium carbonate, bentonite, talc, diatomaceous earth, etc., and CMC, PVA, pregelatinized starch, dextrin, xanthan gum and the like as binders.

Among these carriers, in the case of non-oil-absorbing carriers such as silica sand, calcium carbonate, talc, and porcelain stones, that is, non-oil-absorbing carriers, the solution or suspension of the agrochemical active ingredient is mixed with the carrier, The surface can be wetted, and then fine powder having oil-absorbing property such as white carbon and diatomaceous earth can be added thereto and mixed to be supported on the carrier. The blending amount of the oil-absorbing fine powder varies depending on the amount of the solution and suspension of the agrochemical active ingredient in the granular material, but is usually selected within a range of 1/5 to 2 times the liquid amount.
In the case of an oil-absorbing carrier such as pumice, bentonite, diatomaceous earth, zeolite, attapulgite, gypsum, and a carrier obtained by granulation, that is, an oil-absorbing carrier, a solution or suspension of the agrochemical active ingredient and the carrier are used. It can be made to carry | support to a support | carrier by mixing uniformly.

The seedling box of the present invention is one in which the soil to which the granular material is applied is housed in a seedling box. Application preferably means spraying or blending. Spraying is preferably performed before transplantation, especially several days before or on the day of transplantation, and mixing is preferably performed on floor soil or covering soil immediately before sowing. Examples of the seedling box include a seedling box for transplanted rice, a seedling box for growing seedlings of field crops, a pot, a cell seedling tray, and the like. The application amount such as the application amount and the mixing amount is usually 60 to 600 g, preferably 120 to 360 g per 1 m ^{2 of} soil.
In the granular material, the agrochemical active ingredient is usually 0.01 to 50 parts by mass, preferably 0.1 to 10 parts by mass, the solvent is usually 0.1 to 50 parts by mass, preferably 0.5 to 20 parts by mass, The carrier is usually contained in an amount of 50 to 99 parts by mass, preferably 70 to 95 parts by mass.

  EXAMPLES Hereinafter, although an Example and a test example demonstrate this invention in detail, this invention is not restrict | limited at all by these Examples. In addition, in each example, a part represents a mass part.

Example 1
A solution of 4 parts of carbaryl dissolved in 6 parts of N, N-dimethylacetamide in 2 seedling boxes of 30 cm × 60 cm × 3 cm in the 2.5 leaf stage after seeding paddy rice seeds has a particle size of 0.4 mm Add to 85 parts of ~ 1.2 mm silica sand, mix, and then add 5 parts of Carplex # 80 (white carbon manufactured by Shionogi Pharmaceutical Co., Ltd.) and mix to mix 25 g and 50 g of the desired granular seedlings. Got a box.

Example 2
Instead of the granular material of Example 1, a solution obtained by dissolving 4 parts of diazinon in 6 parts of N, N-dimethylacetamide was added to and mixed with 85 parts of silica sand having a particle size of 0.4 mm to 1.2 mm, and further mixed. A desired nursery box was obtained in the same manner as in Example 1 except that a granular material obtained by adding 5 parts of Carplex # 1120 (white carbon manufactured by Shionogi & Co., Ltd.) and mixing them was used.

Example 3
Instead of the granule of Example 1, a solution obtained by dissolving 4 parts of carbaryl and 2 parts of tricyclazole in 11 parts of N, N-dimethylacetamide was added to 82 parts of pumice having a particle size of 0.4 mm to 1.2 mm and mixed. Then, a desired nursery box was obtained in the same manner as in Example 1 except that a granular material obtained by supporting an N, N-dimethylacetamide solution of an agrochemical active ingredient on pumice was used.

Example 4
Instead of the granular material of Example 1, a solution obtained by dissolving 2 parts of carpropamide in a mixed solvent of 4 parts of N, N-dimethylformamide and 0.5 part of dimethyl sulfoxide was used. Desired raising seedlings in the same manner as in Example 1 except that a granular material obtained by adding and mixing 2.5 parts of Carplex # 80 (white carbon manufactured by Shionogi & Co., Ltd.) in addition to 91 parts of silica sand is used. Got a box.

Example 5
Instead of the granule of Example 1, 85.4 parts of clay and 2.6 parts of pregelatinized starch were mixed, kneaded with an appropriate amount of water, and then extruded from a plate having a 1.5 mm hole. The solution obtained by dissolving 2 parts of mepanipyrim in 8 parts of N, N-dimethylacetamide is added to a granulated carrier having a short diameter of 1.5 mm obtained by drying the granulated product with hot air at 60 ° C. A desired nursery box was obtained in the same manner as in Example 1 except that a granular material obtained by adding and mixing 2 parts of Carplex # 80 (white carbon manufactured by Shionogi & Co., Ltd.) was mixed.

Comparative Example 1
Instead of the granular material of Example 1, 6 parts of diisodecyl adipate were added to and mixed with 85 parts of silica sand having a particle size of 0.4 mm to 1.2 mm, and further 4 parts of carbaryl and Carplex # 80 (manufactured by Shionogi & Co., Ltd.). A comparative nursery box was obtained in the same manner as in Example 1 except that 5 parts of white carbon was added and mixed.

Comparative Example 2
Instead of the granular material of Example 1, 4 parts of diazinon was added to 94 parts of silica sand having a particle size of 0.4 mm to 1.2 mm and mixed, and further 2 parts of Carplex # 1120 (white carbon manufactured by Shionogi & Co.). A comparative nursery box was obtained in the same manner as in Example 1 except that a granular material obtained by adding and mixing was used.

Comparative Example 3
Instead of the granule of Example 1, 5 parts of diisodecyl adipate was added to and mixed with 84 parts of silica sand having a particle size of 0.4 mm to 1.2 mm, and further 4 parts of carbaryl, 2 parts of tricyclazole, and Carplex # 80 (Shiono). A comparative nursery box was obtained in the same manner as in Example 1 except that 5 parts of white carbon (manufactured by Seiko Pharmaceutical Co., Ltd.) was added and mixed.

Comparative Example 4
Instead of the granular material of Example 1, 90 parts of silica sand having a particle size of 0.15 mm to 0.3 mm was mixed with a mixed solvent of 2.5 parts of diisodecyl adipate and 2 parts of phenylxylylethane, and further 2 parts of carpropamide. A comparative nursery box was obtained in the same manner as in Example 1 except that 3.5 parts of Carplex # 80 (white carbon manufactured by Shionogi & Co., Ltd.) was added and mixed.

Comparative Example 5
In place of the granule of Example 1, 2 parts of mepanipyrim, 2 parts of Carplex # 80 (white carbon manufactured by Shionogi Pharmaceutical Co., Ltd.), 93.4 parts of clay and 2.6 parts of pregelatinized starch were mixed, and an appropriate amount of water was mixed. And then kneaded, and excluding the use of granules with a short diameter of 1.5 mm obtained by drying the granules obtained by extruding from a plate with a 1.5 mm hole and drying with hot air at 60 ° C. A comparative nursery box was obtained in the same manner as in Example 1.

Test example 1
Medicinal efficacy and phytotoxicity test for leafhopper leaflets Two seedlings were transplanted from each seedling box of Examples 1 to 3 and Comparative Examples 1 to 3 into four 1 / 10000a pots that had been plucked at a depth of 2 cm. After 5 days and 30 days, they were covered with a wire mesh, and the mortality and phytotoxicity were examined 48 hours after releasing 5 third instar larvae into the pot. The results are shown in Table 1. In the plots of the examples, a high insecticidal effect was obtained 5 days and 30 days after treatment at any spray dose, and there was no phytotoxicity. The insecticidal effect was also low in the mass section, and the insecticidal effect decreased as the number of days after treatment passed.

Test example 2
Effect on Leaf Blast Disease From each seedling box of Examples 3 and 4 and Comparative Examples 3 and 4, one day after the spraying treatment in these, two strains were transplanted in two 1 / 10000a pots, each having a depth of 2 cm. After 15 days and 30 days, conidia spores formed on the dry diseased leaves were suspended in distilled water and inoculated by spraying 4 ml per pot on the leaf surface. After inoculation, it was managed in a humid room in the greenhouse, and after 5 days, the number of lesions was investigated and the control value was calculated from the following formula. In addition, phytotoxicity was also investigated. The results are shown in Table 2. In the plots of the examples, a high control effect was obtained on the 15th and 30th days after the treatment at any spray dose, and there was no phytotoxicity. The volume control also had a low control effect, and it took days to increase the effect slightly.
Control value (%) = (1−average number of lesions in treated area / average number of lesions in untreated area) × 100

Example 6
Instead of using the seedling box used in Example 5, except that a cell seedling tray (54 cm × 27 cm × 5 cm) divided into 128 rooms (16 × 8) for the cotyledon stage of cucumber seedlings grown in a greenhouse was used. In the same manner as in Example 5, a desired nursery box was obtained.

Comparative Example 6
Instead of the seedling box used in Comparative Example 5, except that a cell seedling tray (54 cm × 27 cm × 5 cm) divided into 128 rooms (16 × 8) for the cotyledon stage of cucumber seedlings grown in a greenhouse was used A comparative nursery box was obtained in the same manner as in Comparative Example 5.

Test example 3
Test of effect on cucumber gray mold disease One strain was transplanted from the seedling boxes of Example 6 and Comparative Example 6 into four unglazed pots having a diameter of 12 cm one day after the spraying treatment. 14 days after transplantation (15 days after treatment), a paper disc soaked with the spore suspension was placed on the leaf surface and inoculated. After inoculation, it was managed in a humid room, and after 3 days, the lesion diameter was investigated and the control value was calculated by the following formula. In addition, phytotoxicity was also investigated. The results are shown in Table 3. In the plots of the reference examples, a high control effect was obtained at any spray dose, and there was no phytotoxicity, whereas in the plots of the comparative examples, the control effect was lowered in the low dose group as well as the high dose group.
Control value (%) = (1−average lesion diameter in treated area / average lesion diameter in untreated area) × 100

Effect of the invention

  According to the seedling box of the present invention, in the agricultural chemical treatment in the seedling box of agricultural crops such as paddy rice and field crops, a small amount of the pesticidal active ingredient sufficiently exerts the medicinal effect, and maintains a stable medicinal effect for a long period of time. The risk of exposure to pesticides to workers can be eliminated.

Claims (7)

The agrochemical active ingredient is at least one selected from among formamide, N-methylformamide, N, N-dimethylformamide, N, N-dimethylacetamide, N, N-diethylacetamide, dimethyl sulfoxide and 1,4-butane sultone or Granules obtained by crushing and sieving a liquid substance dissolved or suspended in a solvent mainly composed of silica sand, quartzite, pumice, calcium carbonate, bentonite, talc, diatomaceous earth, attapulgite, gypsum, or ceramic stone granulate diameter is supported on granules of 0.1 to 10 mm (however, zeolite not including) Ri Na houses the applied soil a and the application rates soil 1 m ² per 60~600g of the granulate of
A nursery box characterized by being in range .
The agrochemical active ingredient is at least one selected from among formamide, N-methylformamide, N, N-dimethylformamide, N, N-dimethylacetamide, N, N-diethylacetamide, dimethyl sulfoxide and 1,4-butane sultone or A liquid substance dissolved or suspended in a solvent mainly containing it is made of powdered clay, calcium carbonate, bentonite, talc or diatomaceous earth, and CMC, PVA, pregelatinized starch, dextrin or xanthan gum as a binder. obtained by grains, granules having a particle size is carried on granules of 0.1 to 10 mm (however, not including zeolite) Ri greens houses the applied soil a and the particle
A nursery box, wherein the amount of the applied body is in the range of 60 to 600 g per 1 m ^{2 of} soil .
The nursery box according to claim 1 or 2, wherein the agrochemical active ingredient is at least one selected from among fungicides, insecticides and plant growth regulators.
The seedling box according to any one of claims 1 to 3, wherein the agrochemical active ingredient is sparingly water-soluble.
The nursery box according to any one of claims 1 to 4, further comprising a lactone as a solvent.
The nursery box according to any one of claims 1 to 4, further comprising at least one selected from ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, glycerin and ethers of these polyhydric alcohols as a solvent.
The seedling box according to any one of claims 1 to 6, wherein the application amount of the granular material is in the range of 120 to 360 g per 1 m ^{2 of} soil.